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As part of a plug and abandon program, a major North Sea customer needed to reduce costs and time on a slot recovery operation. In one well, a cement plug was set inside the tapered casing string, consisting of 10 ¾-in. 60.7# L-80 tieback casing from the surface down to 2871 m (9,419 ft). From that point, 9 ⅝-in. 53.5# L-80 casing extended down to 3803 m (12,477 ft).